powerpc: Exporting boot_cpuid_phys

Kernel loadable module can use hard_smp_processor_id() if building with SMP
kernel. In order to make it work for UP kernels too, boot_cpuid_phys
symbol (which is what hard_smp_processor_id() macro resolves to
in non-SMP configuration) must be exported.
Signed-off-by: NAndrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/setup_32.c

@@ -49,6 +49,7 @@ extern void bootx_init(unsigned long r4, unsigned long phys);
 int boot_cpuid = -1;
 EXPORT_SYMBOL_GPL(boot_cpuid);
 int boot_cpuid_phys;
+EXPORT_SYMBOL_GPL(boot_cpuid_phys);
 
 int smp_hw_index[NR_CPUS];